Use software serial library arduino
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Prints data to the transmit pin of the software serial port as raw bytes. Note that only one SoftwareSerialinstance can receive incoming data at a time. Return a character that was received on the RX pin of the software serial port. It begins the SoftwareSerial on the given baud rate. Warning: You should not connect devices that output serial data outside the range that the Arduino can handle, normally 0V to 5V, for a board running at 5V, and 0V to 3.3V for a board running at 3.3V. It also affects the way that it writes to the Tx pin. If set, SoftwareSerial treats a LOW (0 volts on the pin, normally) on the Rx pin as a 1-bit (the idle state) and a HIGH (5 volts on the pin, normally) as a 0-bit. Inverse_logic: It is used to invert the sense of incoming bits. TxPin: the pin on which to transmit serial data RxPin: the pin on which to receive serial data Syntax: SoftwareSerial(rxPin, txPin, inverse_logic) You need to call SoftwareSerial.begin() to enable the communication. You can create Multiple SoftwareSerial objects, however only one can be active at a given moment.
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It is used to create an instance of SoftwareSerial Object. Different Functions of SoftwareSerial Library Constructor A parameter enables inverted signaling for devices which require that protocol. It is possible to have multiple software serial ports with speeds up to 115200 bps.
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It replicates the serial communication functionality using the software. The SoftwareSerial library allows serial communication on other digital I/O pins. So, Let’s learn about using SoftwareSerial in Arduino. This hardware allows the Atmega chip to receive serial communication even while working on other tasks. The native serial support happens via a piece of hardware (built into the chip) called a UART. The Arduino hardware has built-in support for serial communication on pins 0 and 1.